#[cfg(target_os = "windows")]
pub async fn usb_transfer(file_path: PathBuf) {
    // 使用Windows USB API
}

#[cfg(target_os = "linux")]
pub async fn usb_transfer(file_path: PathBuf) {
    // 使用Linux libusb
}

#[cfg(target_os = "macos")]
pub async fn usb_transfer(file_path: PathBuf) {
    // 使用macOS IOKit
}